CVE-2017-9526: Exposure of Sensitive Information to an Unauthorized Actor

In Libgcrypt before 1.7.7, an attacker who learns the EdDSA session key from side-channel observation during the signing process can easily recover the long-term secret key. 1.7.7 makes a cipher/ecc-eddsa.c change to store this session key in secure memory, to ensure that constant-time point...